Here are some key steps for conducting quality control (QC) of optical frames imported from China:
Pre-Production
Approve Samples
Before mass production, obtain and approve golden samples that meet all specifications for materials, dimensions, colors, and quality standards. These serve as the benchmark for production.
Define QC Criteria
Develop a detailed QC checklist specifying acceptable quality levels (AQL) for different types of defects. Classify defects as critical, major, or minor.
During Production
In-Process Quality Control
Conduct inspections at key stages of production to catch issues early:
- Check raw materials quality
- Monitor frame assembly
- Verify surface finishing and plating
Dimensional Checks
Measure key dimensions like temple length, bridge width, lens size, etc. to ensure they match specifications.
Pre-Shipment Inspection
Visual Inspection
Examine frames for cosmetic defects like scratches, dents, uneven coloring, etc.
Functional Tests
- Check hinge durability and temple flexibility
- Test nose pads and other components
- Verify proper lens fitting1
Material Tests
- Conduct tests for corrosion resistance on metal frames
- Check acetate quality on plastic frames
Packaging Inspection
Verify correct packaging, labeling, and shipping marks.
Additional Considerations
- Use statistical sampling based on ISO 2859-1 standards
- Request relevant test reports and certifications from the supplier
- Consider third-party inspection services for impartial QC
By implementing a comprehensive QC process covering pre-production, in-process, and final inspections, you can effectively control the quality of optical frames imported from China. Regular communication with the supplier and clear quality standards are key to success.
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